羊草两个趋异类型的光合生理生态特性比较的初步研究

对羊草（Ａｎｅｕｒｏｌｅｐｉｄｉｕｍ ｃｈｉｎｅｎｓｅ）种群的两个趋异类型——灰绿型羊草与黄绿型羊草的光合生理生态特性进行了研究，比较了同一生境条件下，两种趋异类型羊草的光合速率、蒸腾速率的日变化，以及两个羊草趋异类型的光合速率对光辐射强度、气温、相对湿度、叶温与气孔扩散阻力的响应。结果表明，同一生境条件下，灰绿型羊草的光合速率与蒸腾速率相对较高，两者的饱和光合速率分别为２３．２与１８．８μｍ ｏｌＣＯ２／ｍ ２·ｓ，光饱和点分别为１３６７．６与１３８７．９μｍ ｏｌ／ｍ ２·ｓ，光补偿点分别为９．８与１４．０μｍ ｏｌ／ｍ ２·ｓ；灰绿型羊草与黄绿型羊草对光强度、气温、相对湿度、叶温、气孔扩散阻力的响应均有显著差异。实验测得的结果说明，同一生境条件下羊草两个趋异类型的光合生理特性变异是明显的，羊草这种生理上的变异为确定两个趋异类型是否为两个生态型提供了一些生理学方面的证据。

The comparison of photosynthetic physiological characteristics between the two divergent Aneurolepidium chinense types

A comparison of the photosynthetic physiological characteristics between two divergent Aneurolepidium chinense typesgrey green type and yellow green type was made. The diurnal changes of photosynthetic rate and evaporation rate were analyzed The response of photosynthetic rate to light radiation,air temperature,relative humidity,leaf temperature,and stomata diffusion resistance for the two Aneurolepidium chinense types in the same habitat were studied.The experimental results show that the phot...